172 lines
5.1 KiB
C
172 lines
5.1 KiB
C
/*
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* libraw1394 - library for raw access to the 1394 bus with the Linux subsystem.
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*
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* Copyright (C) 1999,2000,2001,2002 Andreas Bombe
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* 2002 Manfred Weihs <weihs@ict.tuwien.ac.at>
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* 2002 Christian Toegel <christian.toegel@gmx.at>
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*
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* This library is licensed under the GNU Lesser General Public License (LGPL),
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* version 2.1 or later. See the file COPYING.LIB in the distribution for
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* details.
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*
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*
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* Contributions:
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*
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* Manfred Weihs <weihs@ict.tuwien.ac.at>
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* address range mapping
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* Christian Toegel <christian.toegel@gmx.at>
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* address range mapping
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*/
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#include <config.h>
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#include <unistd.h>
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#include <byteswap.h>
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#include "raw1394.h"
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#include "kernel-raw1394.h"
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#include "raw1394_private.h"
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int raw1394_loop_iterate(struct raw1394_handle *handle)
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{
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struct raw1394_request req;
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int retval = 0, channel;
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if (read(handle->fd, &req, sizeof(req)) < 0) {
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return -1;
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}
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switch (req.type) {
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case RAW1394_REQ_BUS_RESET:
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if (handle->protocol_version == 3) {
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handle->num_of_nodes = req.misc & 0xffff;
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handle->local_id = req.misc >> 16;
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} else {
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handle->num_of_nodes = req.misc & 0xff;
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handle->irm_id = ((req.misc >> 8) & 0xff) | 0xffc0;
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handle->local_id = req.misc >> 16;
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}
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if (handle->bus_reset_handler) {
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retval = handle->bus_reset_handler(handle,
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req.generation);
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}
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break;
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case RAW1394_REQ_ISO_RECEIVE:
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channel = (handle->buffer[0] >> 8) & 0x3f;
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#ifndef WORDS_BIGENDIAN
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handle->buffer[0] = bswap_32(handle->buffer[0]);
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#endif
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if (handle->iso_handler[channel]) {
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retval = handle->iso_handler[channel](handle, channel,
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req.length,
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handle->buffer);
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}
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break;
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case RAW1394_REQ_FCP_REQUEST:
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if (handle->fcp_handler) {
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retval = handle->fcp_handler(handle, req.misc & 0xffff,
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req.misc >> 16,
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req.length,
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(char *)handle->buffer);
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}
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break;
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case RAW1394_REQ_ARM:
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if (handle->arm_tag_handler) {
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retval = handle->arm_tag_handler(handle, req.tag,
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(req.misc & (0xFF)),
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((req.misc >> 16) & (0xFFFF)),
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int2ptr(req.recvb));
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}
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break;
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case RAW1394_REQ_ECHO:
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retval=req.misc;
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break;
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case RAW1394_REQ_RAWISO_ACTIVITY:
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retval = _raw1394_iso_iterate(handle);
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break;
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default:
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if (handle->tag_handler) {
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retval = handle->tag_handler(handle, req.tag,
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req.error);
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}
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break;
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}
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return retval;
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}
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bus_reset_handler_t raw1394_set_bus_reset_handler(struct raw1394_handle *handle,
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bus_reset_handler_t new)
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{
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bus_reset_handler_t old;
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old = handle->bus_reset_handler;
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handle->bus_reset_handler = new;
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return old;
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}
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tag_handler_t raw1394_set_tag_handler(struct raw1394_handle *handle,
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tag_handler_t new)
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{
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tag_handler_t old;
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old = handle->tag_handler;
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handle->tag_handler = new;
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return old;
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}
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arm_tag_handler_t raw1394_set_arm_tag_handler(struct raw1394_handle *handle,
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arm_tag_handler_t new)
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{
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arm_tag_handler_t old;
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old = handle->arm_tag_handler;
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handle->arm_tag_handler = new;
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return old;
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}
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iso_handler_t raw1394_set_iso_handler(struct raw1394_handle *handle,
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unsigned int channel, iso_handler_t new)
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{
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if (channel >= 64) {
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return (iso_handler_t)-1;
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}
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if (new == NULL) {
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iso_handler_t old = handle->iso_handler[channel];
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handle->iso_handler[channel] = NULL;
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return old;
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}
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if (handle->iso_handler[channel] != NULL) {
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return (iso_handler_t)-1;
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}
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handle->iso_handler[channel] = new;
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return NULL;
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}
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fcp_handler_t raw1394_set_fcp_handler(struct raw1394_handle *handle,
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fcp_handler_t new)
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{
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fcp_handler_t old;
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old = handle->fcp_handler;
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handle->fcp_handler = new;
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return old;
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}
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